------------[ cut here ]------------ WARNING: CPU: 1 PID: 0 at net/can/isotp.c:910 isotp_tx_timer_handler+0x110/0x130 net/can/isotp.c:910 Modules linked in: Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.0-rc3-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: frame pointer underflow [<81739a08>] (dump_backtrace) from [<81739afc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:253) r7:81cfea70 r6:822228ec r5:60000193 r4:81d0ce58 [<81739ae4>] (show_stack) from [<81755bd8>] (__dump_stack lib/dump_stack.c:88 [inline]) [<81739ae4>] (show_stack) from [<81755bd8>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<81755b90>] (dump_stack_lvl) from [<81755bfc>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:82448d14 [<81755be4>] (dump_stack) from [<8173a6a4>] (panic+0x11c/0x360 kernel/panic.c:274) [<8173a588>] (panic) from [<80241604>] (__warn+0x98/0x1a4 kernel/panic.c:621) r3:00000001 r2:00000000 r1:00000000 r0:81cfea70 r7:815e9638 [<8024156c>] (__warn) from [<8173a950>] (warn_slowpath_fmt+0x68/0xd4 kernel/panic.c:644) r8:00000009 r7:815e9638 r6:0000038e r5:81eb6aec r4:00000000 [<8173a8ec>] (warn_slowpath_fmt) from [<815e9638>] (isotp_tx_timer_handler+0x110/0x130 net/can/isotp.c:910) r8:000000a0 r7:dddde220 r6:dddde180 r5:85390278 r4:00000000 [<815e9528>] (isotp_tx_timer_handler) from [<802e70d0>] (__run_hrtimer kernel/time/hrtimer.c:1685 [inline]) [<815e9528>] (isotp_tx_timer_handler) from [<802e70d0>] (__hrtimer_run_queues+0x1b0/0x46c kernel/time/hrtimer.c:1749) r5:dddde260 r4:85380278 [<802e6f20>] (__hrtimer_run_queues) from [<802e7418>] (hrtimer_run_softirq+0x8c/0xb8 kernel/time/hrtimer.c:1766) r10:828eb980 r9:00000101 r8:00000100 r7:00000000 r6:00000000 r5:20000113 r4:dddde180 [<802e738c>] (hrtimer_run_softirq) from [<8020133c>] (__do_softirq+0x16c/0x498 kernel/softirq.c:571) r7:df85df08 r6:00000008 r5:00000009 r4:822040a0 [<802011d0>] (__do_softirq) from [<80249f48>] (invoke_softirq kernel/softirq.c:445 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:650 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (__irq_exit_rcu kernel/softirq.c:640 [inline]) [<802011d0>] (__do_softirq) from [<80249f48>] (irq_exit+0x9c/0xe8 kernel/softirq.c:674) r10:823d7bb4 r9:828eb980 r8:00000000 r7:df85df08 r6:81ec0dc0 r5:81ec0dd8 r4:820aaa00 [<80249eac>] (irq_exit) from [<81755d98>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:240) r5:81ec0dd8 r4:820aa9dc [<81755d1c>] (generic_handle_arch_irq) from [<8170d234>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40) r9:828eb980 r8:00000000 r7:df85df3c r6:ffffffff r5:60000013 r4:80208f00 [<8170d218>] (call_with_stack) from [<80200b44>] (__irq_svc+0x84/0xac arch/arm/kernel/entry-armv.S:221) Exception stack(0xdf85df08 to 0xdf85df50) df00: 00000001 00000000 01813c41 8021c220 828eb980 00000001 df20: 828eb980 8220c5d8 00000000 00000000 823d7bb4 df85df64 df85df68 df85df58 df40: 80208efc 80208f00 60000013 ffffffff [<80208ec0>] (arch_cpu_idle) from [<8175ffe4>] (default_idle_call+0x38/0x1b4 kernel/sched/idle.c:109) [<8175ffac>] (default_idle_call) from [<8028e944>] (cpuidle_idle_call kernel/sched/idle.c:191 [inline]) [<8175ffac>] (default_idle_call) from [<8028e944>] (do_idle+0x218/0x2a0 kernel/sched/idle.c:303) r7:8220c5d8 r6:828eb980 r5:8220c498 r4:00000001 [<8028e72c>] (do_idle) from [<8028ece8>] (cpu_startup_entry+0x20/0x24 kernel/sched/idle.c:400) r10:00000000 r9:412fc0f1 r8:80003010 r7:82448464 r6:828eb980 r5:00000001 r4:0000009a [<8028ecc8>] (cpu_startup_entry) from [<80210b94>] (secondary_start_kernel+0x138/0x194 arch/arm/kernel/smp.c:481) [<80210a5c>] (secondary_start_kernel) from [<80201714>] (__enable_mmu+0x0/0xc arch/arm/kernel/head.S:438) r7:82448464 r6:30c0387d r5:00000000 r4:82a0c700 Rebooting in 86400 seconds..